Cigarette tip coil



Patented July 28, 1931 UNITED STATES PATENT OFFICE l ERICH RICHTER, OF-WOLFEN, GERMANY, ASSIGNOR TO I. G. FARIBENINDUSTRIE .AKTIENGESELLSCHAFT,OF FRANKFORT-ON-THE-MAIN, GERMANY CIGARETTE TI]? can.

No Drawing. Application filed Tune 18, 1926, Serial Nd. 116,984, and inGermany March 18, 1925.

This invention relates to material for use as cigarette tips andparticularly to material, or rolls thereof. which may be used incigarette-making machines.

In the cigarette industry extremely thin films consisting of metalpowder and celluas a base for the latter. As the process of manufactureis carried out in a relatively dry atmosphere the foil and paper take upa charge of static electricity as they are unwound from the coil, whichelectrical charge exerts an injurious influence on the subsequent stepsof production.

An object of the present invention is to provide a tipping coil freefrom the defects noted above and which will run smoothly through and maybe accurately and positively guided in the cigarette tipping machine.More specifically, an object is to provide a coil in which themetal-contaning film and/or the paper have such properties thatinjurious charges of static electricity cannot be established.

With the foil or film this is accomplished by using therefor a cellulosederivative which per se is non-static, i. e. is not electmfiable, oradmixtures of cellulose derivatlves which, individually electrifiable.are nonstatic in admixture. Another posibility consists in giving anelectrically excitable foil a well conducting addition, for example,hygroscopic substances, such as glycerine, certain salts and the like,so that the film or foil becomes a good conductor. A particularlyadvantageous manner of securing the conductivity is to employ the metalpowder in such high proportion as to tgive the composite film thedesired degree 0 conductivity. The

desired property is imparted-to the paper in a most simple manner bysaturating with hygroscopic substances, although other means may be usedfor preventing the paper from taking on an electrical charge.

The following examples indicate typical methods of'preparing coils inaccordance with the invention:

(1) Add while well stirring 3 to 4 parts of bronze to 7 parts of a 20percent solution of cellulose -aceto-nitrate, containing from 2 t0 3percent of nitrogen, in the usual solvents with an addition of one ormore of the well known plasticizers in the amount of 5 percent. Afterfiltration the solution is spread in the usual way on a flowingapparatus familiar to those skilled in the art. The film thus producedis wound to cigarette tip coils which when being worked in cigarettemachines; do not take up any electrostatic charge. ,5

(2) Add 3 to 4: parts of bronze to 7 parts of a 20 percent solution of amixture of two parts of ethyl cellulose and'l part of nitrocellulose inthe usual solvents and with an addition of one or more of the usualplasticizers in the amount of 5 percent. This solution is worked in theway described above. The cigarette-tip coil produced does not take upelectrostatic charges.

(3) On taking off the film from the flowing apparatus paper is woundinto its windings. the paper used for this purpose is previously soakedin a 0.5 percent solution of ammonium chloride, passed through a dryingchannel and rewound. Cigarette-tip coils manufac tured with this paperdo not collect electrostatic charges even when the film itself is notmade antistatic.

Coils or rolls embodying the invention may be employed in themanufacture of cigarettes by machinery with complete freedom from thedifiiculties which have been experienced with coils which wereelectrifiable.

Claims:

1. A cigarette tip coil of the type comprising a strip film ofcellulosic material and metal powder, nd a paper strip, characterterizedby the act that both the film and the strip are formed of materialswhich do not retain electric charges.-

2. A cigarette coil as defined in claim 1, wherein one of said stripsincludes hygroscopic material in quantity sufficient to render the stripconductive.

3. The invention as claimed in claim 1, wherein said cellulosic materialcomprises a plurality of cellulosic derivatives, which are individuallyelectrifiable.

In testimony whereof, I affix my signature.

ERICH RICHTER.

